<p>
  去掉冗余的import语句
</p>

<p>以下代码段说明了此规则：</p>

<pre>
package my.company;

import java.lang.String;        // Noncompliant - java.lang classes are always implicitly imported
import my.company.SomeClass;    // Noncompliant - same package files are always implicitly imported
import java.io.File;            // Noncompliant - File is not used

import my.company2.SomeType;
import my.company2.SomeType;    // Noncompliant - “ SomeType”重复导入

class ExampleClass {

  public String someString;
  public SomeType something;

}
</pre>
